Request that a source be added to the Genealogy Indexer. Include a brief description of contents, with as much of title, geographic scope, date, and organizational structure as you know. If the source is already online, provide a link.

Not sure if this is of interest given the later time period but thought I would mention as it did look like you have some directories from 1950s Germany already posted...this gentleman has scanned his copy of the 1957 Berlin directory, perhaps he'd be willing to have it searchable on your site?